256 MEETINGS. 



Monthly Meeting held on September 13th, 1893, Mr. E. D. 

 Marquand, President, in the chair. 



After reading and signing the minutes of the last meeting 

 (in July), the following persons were unanimously elected 

 members of the Society : — Lieut-Col. J. H. Harvey, Col. C. 

 Durand, Rev. J. L. Le Pelley, and Mr. J. S. Ozanne. 



The President called attention to the inconvenience of 

 terminating the financial year of the Society in September, as 

 at present, and urged many cogent reasons for altering the 

 rule, fixing the annual meeting in October. After discussion 

 it was unanimously decided to make the required change in 

 the Society's rules so as to fix the annual meeting during the 

 month of December, and the Society's year to commence on 

 January 1st and terminate on December 31st. 



Mr. W. Sharp exhibited a collection of flint chips and 

 cores from Alderney, and Mr. Collenette several curious and 

 interesting examples of rock and minerals from Bordeaux. 

 Mr. Luff exhibited specimens of the new British moth (Cara- 

 drina rupestris), about twenty of which he captured on the 

 coast near the Yale Castle on August 20th. The sectional 

 secretaries described the work that had been done at the 

 excursions since the last meeting. 



The President then gave a lucid explanation of that 

 curious phenomenon called "alternation of generations," 

 illustrating his remarks, which were mostly confined to cer- 

 tain of the leaf-fungi JEcidiwm, Puccinea and JJredo, by 

 diagrams on the blackboard. 



Monthly Meeting held on October 11th, 1893, Mr. E. D. 

 Marquand, President, in the chair. 

 After disposing of formal business, Mr. T. Domaille was 

 unanimously elected a member of the Society. Mr. Luff 

 exhibited several rare insects, some of which were additions 

 to the Guernsey list, perhaps the most interesting being a new 

 butterfly (Ccenonympha pamphilus), taken by Mrs. Boley, 

 who also exhibited some very fine specimens of the Pale 

 Clouded Yellow Butterfly (Colias Hyale) lately captured by 

 her. Mr. Collenette reported the finding of pebbles in the 

 St. Martin's clay deposit, and pointed out the importance of 

 the find as bearing upon the probable origin of the clay. 



The President read a paper on the " Diatoms of Guern- 

 sey," which, together with the list of species, is printed in the 

 following pages. The subject was afterwards more minutely 

 gone into and elucidated by means of enlarged drawings and 

 blackboard sketches. 



